Falling Sand SimulatorA pixel sandbox where every grain reacts.

A sandbox where the screen is a grid of tiny cells and each cell is a material. Simple rules for each material, such as sand falls, water flows, fire rises and burns, add up to rich behaviour: dunes, waterfalls, wildfires and chemical reactions.

Yes. It is free with no sign-up and no watermark on your pictures or videos. It runs in your browser, with nothing to install.

Sand, water, stone, wood, fire, oil, lava, ice, snow, plants, seeds, acid, salt, metal, glass, gunpowder, gas, steam, smoke, mud, ash and indestructible walls, plus salt water and embers that appear through reactions.

Fire lights wood, oil, plants, gas and gunpowder; water puts fire out and turns to steam; steam rises and condenses into water; lava turns water into steam and cools into stone; salt dissolves in water; acid eats almost everything except glass and walls; seeds sprout when they touch water.

Press Record, play and draw as usual, then press Stop. Choose the time-lapse speed, video shape (9:16, 1:1 or 16:9), resolution and frame rate, and export an MP4 (or WebM in browsers without MP4 encoding). The video is rendered from the recording, so it is perfectly smooth even if your device was busy.

Yes. Save scene downloads a small file you can open again later or share with friends. Save PNG keeps a crisp picture of the world.

Yes. Open a PNG or JPG and each pixel becomes the material with the nearest colour, then press Play and watch it crumble, flow and burn.

Yes. Draw with your finger, pick materials from the toolbar and use the Vertical 9:16 world size for clips that fill a phone screen.